Description
Overview
GAOTek Hydrogen Bromide Gas Sensor Detector with two/three wire TTL/0-20mA/RS485 output, integrates toxic gas sensor + transmitter board. Adopting imported advanced electrochemical gas sensors, it has features of high accuracy, long lifetime, high stability and high anti-interference. The module is designed to prevent circuit reversed connection, high voltage, high current and lightning.
Features
- Long lifetime imported advanced electrochemical sensors
- High accuracy op ams, power supply IC, stable and sensitive
- Detect low or high concentration toxic gases precisely
- High anti-interference ability
- Over range protection, reversed polarity protection and lightning protection
- Low power consumption with a standard 4-20mA two/three-wire signal output
Technical Specifications
| Detected gas | Toxic gas |
| Detecting principle | Electrochemistry |
| Sampling | Diffusing pump flange thread |
| Responding time | 30 s to 40 s (of the sensor) |
| Module accuracy | ≤ ± 3% FS (actual concentration, higher accuracy depends on specified sensors) |
| Module repeatability | ≤ ± 2% FS |
| Module linear error | ≤ ± 2% FS |
| Module zero temperature drift | ≤ ± 2% (FS/year) |
| Module operating temperature | -40 °F to 176 °F (-40 °C to 80 °C) |
| Module humidity | 0 RH to 95% RH (non-condensation) |
| Sensor operating temperature | -4 °F to 122 °F (-20 °C to 50 °C) |
| Sensor humidity | 0 RH to 90% RH (non-condensation) |
| Signal output | TTL/ 4-20mA / RS485 (two or three wire) |
| Transmitting distance | 3200 ft (1000 meters) (RS485) |
| Operating voltage | DC 12 V to 36 V |
| Maximum power | ≤ 0.8 W |
| Size | 3.14 in x 1.88 in (80 mm x 48 mm) |
| Explosion proof | Intrinsic safe |
| Connection cable | RVVP3 x 1.5mm² |